Rack



FIG. 1 is a top perspective view of a rack showing my new design;

FIG. 2 is a left side elevational view thereof, the right side being amirror image;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a front elevational view thereof.

The ornamental design for a rack, as shown and described.